Technical specifications of activated carbon (unwashed)) Appearance fine black powder fine black powder fine black powder fine black powder Methylene blue value mg / gm.150 mg / gm200 mg / gm.250 mg / gm.300 mg / gm. Iron contents1000 ppm1000 ppm800 ppm600 ppm Ph9 to 119 to 119 to 119 to 11 L.O.D.12%10%10%10% Ash contents12 - 15%12 - 15%10 - 12%10 - 12% Acid soluble matter6.5% w / w6.5% w / w6.0% w / w5.0% w / w Water soluble matter5.0% w / w5.0% w / w4.0% w / w4.0% w / w 25kg